What is Johnson City UV index today?
Consult Johnson City UV index today to determine whether the sun exposure is safe or if precautions should be taken.
Johnson City Current UV Index
0.1641
UV Index Datetime
2024-11-23 13:07:04
Johnson City Max UV Index
2.5028
Max UV Index Datetime
2024-11-23 17:17:33
City
Johnson City
Country
United-States
Latitude
36.3406
Longitude
-82.3806
Today's max Johnson City UV index is low, registering at 2.5028 around 2024-11-23 17:17:33. Enjoy outdoor activities safely, as the sun's rays are not very strong.
Current Johnson City UV index is low, registering at 0.1641. Enjoy outdoor activities safely, as the sun's rays are not very strong.
What's the uv right now in Other Cities of United-States (Today UV Rays)
Johnson City Real-Time UV Index Forecast Chart (Hourly Johnson City UV Index Chart)
Explore Johnson City UV Index Forecast Chart for next hours to stay informed about the varying levels of ultraviolet radiation index throughout the day
Safe Exposure Time Calculation in (Time to Burn Chart)
The most commonly used scheme to classify a person’s skin type by their response to sun exposure in terms of the degree of burning and tanning was developed by Thomas B. Fitzpatrick, MD, PhD. As a meter of fact even the skin color of Emoji characters based on the Fitzpatrick scale.
| Skin Type | Color | Typical Features | Tanning Ability | Time to Burn (minutes) |
|---|---|---|---|---|
| I | Red or blond hair; light-colored eyes; freckles likely | Always burns, does not tan | 1015.64 | |
| II | Light eyes; light hair | Burns easily, tans poorly | 1218.77 | |
| III | Any eye or hair color (very common skin type) | Tans after initial burn | 1625.03 | |
| IV | Dark brown hair; medium to heavy pigmentation | Burns minimally, tans easily | 2031.28 | |
| V | Dark hair; rarely sun sensitive | Rarely burns, tans darkly easily | 3250.05 | |
| VI | N/A | Never burns, always tans darkly | 6093.85 |
Ultraviolet Radiation Reflection from Surfaces
Highly reflective surfaces can increase surrounding levels of solar UV including concrete, snow, glass, water and polished metals (see source).
Reflected UV Levels
| Material | Reflected Solar UV Rays (%) | Effective UV Index | UV Color |
|---|---|---|---|
| New black roadway (Asphalt) | 4.1% | 0.17 | |
| Old grey roadway (Asphalt) | 8.9% | 0.18 | |
| Footpath (Concrete) | 10.1% | 0.18 | |
| Grasslands (Grass) | 1.2% | 0.17 | |
| Lawn (Grass) | 3.5% | 0.17 | |
| Fiberglass boat deck | 9.1% | 0.18 | |
| White house paint | 22% | 0.2 | |
| Wet beach sand | 7.1% | 0.18 | |
| Dry beach sand | 16.5% | 0.19 | |
| Clay/humus (Soil) | 5% | 0.17 | |
| Open water | 3.3% | 0.17 | |
| Open ocean | 8% | 0.18 | |
| Sea surf/white foam | 27.5% | 0.21 | |
| Snow old/new | 69% | 0.28 | |
| Wood boat deck | 6.6% | 0.17 |
Required Sunlight Exposure for Vitamin D in Johnson City
Vitamin D is a hormone that controls calcium levels in the blood. It is needed to develop and maintain healthy bones, muscles and teeth and is also important for general health. The human body can get vitamin D in two ways: diet or sun exposure.
Minutes for sunlight exposure for sufficient Vitamin D intake (see source).
| Skin Type | Exposure Time (Johnson City Current UV Level: Low) |
|---|---|
| I | 15-20m |
| II | 20-30m |
| III | 30-40m |
| IV | 40-60m |
| V | 60-80m |
| VI | - |
Johnson City Historical UV Index Trends Over the Past Year (Monthly Johnson City UV Index Chart)
This chart presents a detailed view of the UV rating index fluctuations throughout the past year, enabling you to identify the months with lower UV levels. By observing the monthly UV trends, you can determine the safer periods for outdoor activities with reduced risk of harmful UV exposure. It's a practical tool for planning outdoor ventures while prioritizing skin health and safety.
